1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90036bdb5a37abf7fd39430ba2aedcb899059f2d53a95f7694f845866fa26e5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa0417e8-6985-401f-ba20-f3b70f8ac21b.json and https://artists.proofprofile.net/proofs/artist/aa0417e8-6985-401f-ba20-f3b70f8ac21b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338cb3797c852a68f2a46554412901dde63dcb75fde9769186a538618e8772b5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NO3EZ1701020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bccea8de8d3a846f44fa2c8ecff02da67c34234efd272a3c451e41dbe770900. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NO3EZ1701030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38d955ac8829dcbdf93946fbf068a0c9592ad8fd55ba4fbe487636f689113ac. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NO3EZ1701040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc32deb0500aaef66e4940fce89ce2809c13b788461b1ec3a846e7b8116ea94. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NO3EZ1701060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26377d851bbb943ab9e6ef58c4493c8940f5fec0748c982cc32e322be9feff89. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB5EA1503984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d36912b2039c7a8b244387d9707a0b574f89321657403401b3b1932230a44b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCVC2072010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af016cf0fe17c55423c9a5107dc0328456ba519f18692dddc2bf71ba85dc2f5. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCVC2072020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87850aad2e8a15f26922de4e12a505f5c90d991410e77159f5f9ccae24517729. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCVC2072030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ba2e0fcddc355870dd4496e90aeb8ab096814a858c6008233bc08ccc885012. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCVC2072040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02df5e50c107b3f9ca491a6408506a19e827f88569e2991adbca8e99a9070bb5. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCVC2072050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c1e2695cffa0cb27a46fce9b83cad81e502af5782919dbddb28fbca6d21f39. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCVC2072060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce44de4170370d275fabc7818b75ecd7b253e1a2d3fb3bb5ba3f9de3dec1300. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCVC2072070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a60d34799e1c62bae599b5b9e881d39be9ebe512b00de0275c945ea2a79a3f. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCVC2072080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d36912b2039c7a8b244387d9707a0b574f89321657403401b3b1932230a44b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCVC2072010.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446bafd678b7afd490ec1f18cdf1cbac8303b7e2f942a29787ad8e5f1aadfc27. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCVC2235010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f51b38f0746e62da452cb4072bc4cbbe420430cfa2dfd296850685fa993de4b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCVC2548010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c278bfc05a4492a0046cff9fb63d9073fbce2cf2e5cfc8e1d3de2f4637e2c51. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:12:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCVC2548030.